CONSOLIDATED STATEMENTS OF COMREHENSIVE INCOME (LOSS) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Income Statement [Abstract]
Revenues	$ 7,806.6	$ 6,228.6	$ 5,987.6
Operating expenses	6,757.5	5,258.2	5,157.0
Selling, general and administrative expenses	628.3	719.2	506.1
Restructuring and related expenses	0.0	0.0	7.6
Amortization of intangible assets	72.1	45.0	48.4
Impairment loss of goodwill and other intangibles	0.0	0.0	172.8
Operating profit	348.8	206.3	95.7
Income from unconsolidated affiliates	2.4	2.1	2.2
Interest expense	(41.1)	(28.6)	(44.6)
Income from continuing operations before income taxes	310.0	179.8	53.3
Income tax provision	(79.6)	(53.5)	(53.1)
Income from continuing operations	230.4	126.3	0.2
Income from discontinued operations, net of taxes	0.0	0.0	0.1
Net income	230.4	126.3	0.3
Other comprehensive income (loss)
Interest rate swaps	36.7	4.5	(7.6)
Foreign currency translation and other	(19.8)	5.3	(1.8)
Income tax (provision) benefit	(10.5)	(1.5)	2.4
Comprehensive income (loss)	$ 236.9	$ 134.5	$ (6.6)
Net income per common share — Basic
Income from continuing operations (in USD per share)	$ 3.44	$ 1.87	$ 0.00
Income from discontinued operations (in USD per share)	0	0	0
Net income (in USD per share)	3.44	1.87	0.00
Net income per common share — Diluted
Income from continuing operations (in USD per share)	3.41	1.86	0.00
Income from discontinued operations (in USD per share)	0	0	0
Net income (in USD per share)	$ 3.41	$ 1.86	$ 0.00
Weighted-average common and common equivalent shares outstanding
Basic (in shares)	67.1	67.4	66.9
Diluted (in shares)	67.5	68.0	67.3